+.TP
+.B darwin
+Access method used on Mac OS X / Darwin. Must be run as root and the system
+must have been booted with debug=0x144.
+.TP
+.B win32-cfgmgr32
+Device listing on Windows systems using the Windows Configuration Manager
+via cfgmgr32.dll system library. This method does not require any special
+Administrator rights or privileges. Configuration Manager provides only basic
+information about devices, assigned resources and device tree structure. There
+is no access to the PCI configuration space but libpci either tries to use
+other access method to access configuration space or it provides read-only
+virtual emulation based on information from Configuration Manager. Other
+access method can be chosen by the
+.B win32.cfgmethod
+parameter. By default the first working one is selected (if any). Starting
+with Windows 8 (NT 6.2) it is not possible to retrieve resources from 32-bit
+application or library on 64-bit system.
+.TP
+.B win32-sysdbg
+Access to the PCI configuration space via NT SysDbg interface on Windows
+systems. Process needs to have Debug privilege, which local Administrators
+have by default. Not available on 64-bit systems and neither on recent 32-bit
+systems. Only devices from the first domain are accessible and only first
+256 bytes of the PCI configuration space is accessible via this method.
+.TP
+.B win32-kldbg
+Access to the PCI configuration space via Kernel Local Debugging Driver
+kldbgdrv.sys. This driver is not part of the Windows system but is part of
+the Microsoft WinDbg tool. It is required to have kldbgdrv.sys driver installed
+in the system32 directory or to have windbg.exe or kd.exe binary in PATH.
+kldbgdrv.sys driver has some restrictions. Process needs to have Debug privilege
+and Windows system has to be booted with Debugging option. Debugging option can
+be enabled by calling (takes effect after next boot):
+.B bcdedit /debug on
+.IP
+Download links for WinDbg 6.12.2.633 standalone installer from Microsoft Windows
+SDK for Windows 7 and .NET Framework 4:
+.br
+amd64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_amd64/dbg_amd64.msi
+.br
+ia64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_ia64/dbg_ia64.msi
+.br
+x86: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools/dbg_x86.msi
+.IP
+Archived download links of previous WinDbg versions:
+.br
+https://web.archive.org/web/20110221133326/https://www.microsoft.com/whdc/devtools/debugging/installx86.mspx
+.br
+https://web.archive.org/web/20110214012715/https://www.microsoft.com/whdc/devtools/debugging/install64bit.mspx